package com.wobito.common.utils;


import javax.servlet.http.HttpServletRequest;

/**
 * @Author: lambyang
 * @CreateTime: 2024-09-19
 * @Description:
 * @Version: 1.0
 */
public class IpUtils {

    public static String getClientIp(HttpServletRequest request) {
         String ip = request.getHeader("X-Forwarded-For");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        // 对于通过多个代理的情况，第一个IP是客户端真实IP,但后面可能会跟其他代理的IP
        if (ip != null && ip.length() > 15 && ip.indexOf(",") > -1) {
            ip = ip.substring(0, ip.indexOf(","));
        }
        return ip;
    }

}
